How many grams of #NaOH# are required to prepare 200 mL of a 0.450 M solution?

Answer 1

3.60g of NaOH is required to prepare that solution

Let's begin with the equation for molarity:
To obtain the mass of solute, we will need to the molar mass of NaOH, which is 40.00 g/mol:

Finally, multiply the number of moles by 40.00 g/mol

#0.09 cancel"mol" xx (40.00g)/(1cancel"mol")# #=3.60g#

Boom, you have a mass of:
#3.60g#

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Answer 2

Luna Chen

To prepare 200 mL of a 0.450 M NaOH solution, you would need 4.5 grams of NaOH.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.